Question

Assume an \(8\times 8\) chessboard with usual colouring. You may repaint all the squares of a row or column. The goal is to attain one black square. Possible?

Answer 1

yes

Answer 2

i think

Answer 3

do u need explanation

Answer 4

What does repaint mean?
Invert the colours of a row?
(IE turn all light squares dark and vice versa)

Answer 5

ok suppose that we want one black square that is how we can do it

Answer 6

black square is in the middle lets say at 4rth row and 4rth coloumn

Answer 7

yes

Answer 8

first we paint all the rows except 4rth one with white color not 4rth row 4rth row must have one black

Answer 9

then we paint all coloumns with white except 4rth coloumn

Answer 10

So, in simple terms, repainting is a function that maps...